9,788 research outputs found
Getting management accounting off the ground: post-colonial neoliberalism in healthcare budgets
Taking Sven Modell’s (2014, pp. 83–103) “societal relevance of management accounting” agenda forward, and based on a cost accounting initiative in a Sri Lankan hospital, this paper examines how management accounting is implicated in societal relevance. It reports on a postcolonial neoliberal state’s use of cost-saving experiments and the resultant emancipation of the individuals involved. It runs a bottom-up analysis, from micro events in the hospital to policymaking at the level of the Provincial Council. This analysis suggests that cost accounting acts as a mediating instrument: it begins to loosen the old Keynesian postcolonial bureaucratic budget confinements, creates a social space for individuals to consider cost-saving experiments, and addresses wider policy concerns about hospital resource management. The story is illuminated by Gilles Deleuze’s and Zigmund Bauman’s ideas on post-panoptic societies: old confinements are being problematized and new flexible, “liquid” spaces created, in which individuals are emancipated in terms of their ability to influence resource management within and beyond the organizational constituency
Cyclotron spectroscopy of VV Puppis
We present phase-resolved spectrophotometric observations of VV Puppis
obtained during two different states of accretion. We confirm the detection of
cyclotron lines from emission regions at both poles (Wickramasinghe et al.
1989) having significantly different field strength of B_1 ~ 31MG and B_2 ~
54MG. Our phase-resolved data allowed the detection of phase-dependent
wavelength shifts of the cyclotron lines from the main accretion pole which is
due to the varying aspect of the observer. A corresponding motion of the
cyclotron lines from the secondary pole appears likely. Compared to 1984, the
cyclotron lines from the main pole appeared redshifted in 1989, during an
episode of higher system brightness. This shift can be explained assuming
either different locations of the accretion spot and, hence, variations of the
magnetic field, or variations of the plasma temperature both triggered by
variations of the mass accretion rate. The cyclotron lines from the second pole
do not show such changes suggesting that the coupling region for the weakly
accreting pole is more or less stationary whereas the coupling region of the
main pole varies in space, most likely depending on the mass accretion rate.Comment: 11 pages, 7 postscript figures Astronomische Nachrichten, in press
see also http://www.aip.de:8080/science/Preprints.htm
Cosmic Needles versus Cosmic Microwave Background Radiation
It has been suggested by a number of authors that the 2.7K cosmic microwave
background (CMB) radiation might have arisen from the radiation from Population
III objects thermalized by conducting cosmic graphite/iron needle-shaped dust.
Due to lack of an accurate solution to the absorption properties of exceedingly
elongated grains, in existing literature which studies the CMB thermalizing
process they are generally modelled as (1) needle-like spheroids in terms of
the Rayleigh approximation; (2) infinite cylinders; and (3) the antenna theory.
We show here that the Rayleigh approximation is not valid since the Rayleigh
criterion is not satisfied for highly conducting needles. We also show that the
available intergalactic iron dust, if modelled as infinite cylinders, is not
sufficient to supply the required opacity at long wavelengths to obtain the
observed isotropy and Planckian nature of the CMB. If appealing to the antenna
theory, conducting iron needles with exceedingly large elongations (10^4)
appear able to provide sufficient opacity to thermalize the CMB within the iron
density limit. But the applicability of the antenna theory to exceedingly thin
needles of nanometer/micrometer in thickness needs to be justified.Comment: 13 pages, 4 figures; submitted to ApJ
How do microorganisms reach the stratosphere?
A number of studies have demonstrated that bacteria and fungi are present in the stratosphere. Since the tropopause is generally regarded as a barrier to the upward movement of particles it is difficult to see how such microorganisms can reach heights above 17 km. Volcanoes provide an obvious means by which this could be achieved, but these occur infrequently and any microorganisms entering the stratosphere from this source will rapidly fall out of the stratosphere. Here, we suggest mechanisms by which microorganisms might reach the stratosphere on a more regular basis; such mechanisms are, however, likely only to explain how micrometre to submicrometre particles could be elevated into the stratosphere. Intriguingly, clumps of bacteria of size in excess of 10 μm have been found in stratospheric samples. It is difficult to understand how such clumps could be ejected from the Earth to this height, suggesting that such bacterial masses may be incoming to Earth.
We suggest that the stratospheric microflora is made up of two components: (a) a mixed population of bacteria and fungi derived from Earth, which can occasionally be cultured; and (b) a population made up of clumps of, viable but non-culturable, bacteria which are too large to have originated from Earth; these, we suggest, have arrived in the stratosphere from space. Finally, we speculate on the possibility that the transfer of bacteria from the Earth to the highly mutagenic stratosphere may have played a role in bacterial evolution
Enigmas from the Sloan Digital Sky Survey DR7 Kleinman White Dwarf Catalog
We report results from a continuation of our searches for high field magnetic
white dwarfs paired in a detached binary with non degenerate companions. We
made use of the Sloan Digital Sky Survey DR7 catalog of Kleinman et al. (2013)
with 19,712 spectroscopically-identified white dwarfs. These include 1,735
white dwarf plus M dwarf detached pairs (almost 10\% of the Kleinman at al.'s
list). No new pairs were found, although we did recover the polar (AM~Herculis
system) ST\,LMi in a low state of accretion. With the larger sample the
original situation reported ten years ago remains intact now at a much higher
level of statistical significance: in the selected SDSS sample, high field
magnetic white dwarfs are not found in an apparently-detached pairing with an M
dwarf, unless they are a magnetic CV in a low state of accretion. This finding
strengthens the case that the fields in the isolated high field magnetic white
dwarfs are generated by stellar mergers but also raises questions on the nature
of the progenitors of the magnetic CVs.Comment: 12 pages, accepted for publication in the Astrophysical Journa
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